Mimo-ofdm Verification Platform And Synchronization Technology

As the mainstream technology program of 4th mobile communication in future, MIMO-OFDM(Multi-Input-Multi-Output Orthogonal Frequency Division Multiplexing) technology is always a hot spot for research in recent years. MIMO technology can improve the transmission rate and spectrum efficiency of wireless channel, while OFDM can reduce the impact of the multipath fading channel, so combination of the two improves the channel capacity and transmission rate.In contrast to MIMO-OFDM verification platform at a earlier start abroad, there are very few hardware platforms customized specifically for MIMO-OFDM at home, base on this consideration, setting up a self-built MIMO-OFDM verification platform which has an all-FPGAs architecture becomes the base of research and realization on MIMO-OFDM system.OFDM is very sensitive to the carrier frequency offset, in order to reduce the ruin of system performance decreasing caused by synchronization offset, so synchronous technology is very critical for realization of OFDM system.This thesis introduces the advantages and disadvantages as well as development status of MIMO and OFDM technology, then taking the MIMO-OFDM hardware platform as the beginning, and then the development status of MIMO-OFDM platform at home and abroad, based on that shows the hardware solution and design process, at last taking the PCB board as the result form. Then related technologies of OFDM synchronization are discussed and on the research, and the algorithm of synchronization process for realization is established. The next, the frame structure we use based on IEEE 802.11a protocol is introduced, base on that every module is designed for FPGA which includes frame,carrier frequency,symbol synchronization of OFDM synchronization. Then simulation results from ModelSim simulation environment are given , at last every module is tested online by using Chipscope Pro software on the MIMO-OFDM verification platform made by myself before, and the results verify the correctness of the simulation process, prove this implementation design lower rate of resource occupation,high reliability and good design convenience.